feat: complete monorepo structure with frontend and shared resources

- Add complete backend/ directory with full Django application
- Add frontend/ directory with Vite + TypeScript setup ready for Next.js
- Add comprehensive shared/ directory with:
  - Complete documentation and memory-bank archives
  - Media files and avatars (letters, park/ride images)
  - Deployment scripts and automation tools
  - Shared types and utilities
- Add architecture/ directory with migration guides
- Configure pnpm workspace for monorepo development
- Update .gitignore to exclude .django_tailwind_cli/ build artifacts
- Preserve all historical documentation in shared/docs/memory-bank/
- Set up proper structure for full-stack development with shared resources

backend/apps/parks/querysets.py

@@ -0,0 +1,17 @@
+from django.db.models import QuerySet, Count, Q
+from .models import Park
+
+
+def get_base_park_queryset() -> QuerySet[Park]:
+    """Get base queryset with all needed annotations and prefetches"""
+    return (
+        Park.objects.select_related("operator", "property_owner", "location")
+        .prefetch_related("photos", "rides")
+        .annotate(
+            current_ride_count=Count("rides", distinct=True),
+            current_coaster_count=Count(
+                "rides", filter=Q(rides__category="RC"), distinct=True
+            ),
+        )
+        .order_by("name")
+    )